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  • Magnetic Baton question

    For the magnetic batons used in the field, what kind of magnet is used in them?

  • #2
    they are (according to the manufacturer) Neodymium Cylinder Magnets.

    The source for the magnets is listed in the bill of materials for the field:
    http://www.kjmagnetics.com/proddetail.asp?prod=D4X0

    If you want too much detail the specs are:
    * Dimensions: 1/4" dia. x 1" thick
    * Tolerances: ±0.004" x ±0.004"
    * Material: NdFeB, Grade N42
    * Plating/Coating: Ni-Cu-Ni (Nickel)
    * Magnetization Direction: Axial (Poles on Flat Ends)
    * Weight: 0.213 oz. (6.03 g)
    * Pull Force, Case 1: 4.13 lbs
    * Pull Force, Case 2: 4.13 lbs
    * Surface Field: 6549 Gauss
    * Max Operating Temp: 176ºF (80ºC)
    * Brmax: 13,200 Gauss
    * BHmax: 42 MGOe

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    • #3
      we were curious as to what kind of magentic sensors other teams were using. we've heard about the reed switch, and the hall sensor, but we weren't sure which ones worked, and how well.

      any ideas?

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      • #4
        Visible?

        I was wondering that since the magnetic baton is a pipe with a magnet in it, would you be able to see is there is a magnet in it???

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        • #5
          Originally posted by 2010FTC4697 View Post
          I was wondering that since the magnetic baton is a pipe with a magnet in it, would you be able to see is there is a magnet in it???
          yes, sort of... in the Q&A there is actually a question about using a light sensor to see through a baton (The Game - Game Play - #2). The magnets obviously block light, while the normal ones have nothing and you can see through them.

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          • #6
            Our team has experimented with the Hitechnic hall effect sensor, and it can detect the magnet baton from several(2-3) inches away.
            Max Bareiss

            FTC #248 Fatal Error (2009-2013)
            FRC #3142 Aperture (2009-2012)
            FRC #1302 Team Lionheart (2012-2013)
            ZRHS #89 Team Kühlschrank (2011-2013)
            ZRAC #40 Catcher in the Skye (2012)
            ISR 12: Umptysquatch 6
            Rowan University Baja SAE

            And mentoring for life.
            --
            11 seasons of FIRST in 6 years, as a student. Many more as a mentor.

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